KIP 7170K, Service Manual

Page: 91 / 865

K134sm3e1 3-11
3. 1. 2. 6 Separation
The printing paper is attracted to the Drum after the Transfer because the potential of paper is
positive and that of Drum is negative.
It is necessary for avoiding the jam to separate the paper from the Drum by removing the static
force between them.
The Separation Corona takes AC discharge being supplied with the AC voltage and the DC
voltage.
AC voltage : 5.0KV
DC voltage : -250V
As the AC voltage is compensated by the negative DC voltage, the negative charges are
generated more than positive ones, which mainly results in removing the positive charges of the
printing paper.
On the other hand, the Separation Lamp throws light from under the Corona Wires to remove the
negative charges of the Drum.
The static force between the printing paper and the Drum is reduced as a result, and the paper is
separated from the Drum by its weight.
Negative charges of the Drum are removed
by the light from the Separation Lamp.
Drum
Separation Corona Positive charges of the paper are
removed by the AC discharge.
Separation Lamp
20V
620V